446 Memoirs on the Coleoptera 



defined; elytra obtusely parabolic, with large but moderate humeral 

 swellings, distinctly wider than the prothorax and about twice as 

 long; striae deep, moderately coarse; interstitial punctures some- 

 what strong where exposed. Length (?) 4.15 mm.; width 1.7 

 mm. Mexico (Sierra Madre Mts., Chihuahua),— C. H. T. Town- 

 send *townsendi n. sp. 



Body narrower, elongate, suboval or parallel, the prothorax always 

 evidently narrower than the elytra 3 



3 — Punctures of the elytral strise strong, deep and shining, producing a 

 catenulate effect but not at all crenate. Body narrowly elongate- 

 oval, convex, black and subalutaceous, the under surface, beak 

 distally, and the legs, rufescent; squamules above fine, whitish, 

 very even and sparse on the pronotum, more distinct and forming 

 even single interstitial lines on the elytra; scutellum small, narrow, 

 emarginate, having only two or three minute slender squamules; 

 white scales beneath more or less separated; beak in the female 

 short, smooth, feebly arcuate, not as long as the prothorax, the 

 antennae shorter than usual but of the same general type, inserted 

 near four-sevenths; mandibles forming a very obtuse ogive when 

 closed, strongly crenate within; prothorax barely wider than long, 

 the sides feebly converging, moderately and subevenly arcuate 

 from base to the wholly unconstricted apex, which is rather more 

 than half as wide as the base; punctures strong, even and somewhat 

 close-set; elytra parallel basally, oval in apical half, with the humeral 

 swelling feeble, slightly wider than the prothorax and twice as long, 

 striae deep, abrupt; intervals not quite twice as wide as the striae, 

 the punctures fine, not close and uniseriate. Length (9 ) 2.8 mm.; 

 width 0.9 mm. Brazil (Para), — Baker *striatOpunctatus n, sp. 



Punctures of the striae normal, never very conspicuous 4 



4 — Thoracic punctures generally more or less coarse, always clearly 

 defined and separated among themselves 5 



Thoracic punctures clearly defined but relatively fine and notably dense; 

 body small in size 15 



Thoracic punctures in great or entire part confluent, forming long sub- 

 sinuous longitudinal rugae 16 



5 — Vestiture of the pronotum uneven, the squamules small, dark and 

 inconspicuous, but becoming pale and more distinct along the 

 median line and abruptly rather broadly toward the sides 6 



Vestiture subuniform throughout the pronotum, sometimes gradually 

 somewhat more evident toward the sides though never abruptly 

 and never condensed along the median line 1 1 



6 — Elytra notably elongate, about four-fifths longer than wide. Body 

 narrow, black throughout; squamules above brownish-white, the 

 three vittae distinct on the pronotum; strial intervals each with 

 about two irregular close-set series, the scutellum small, densely 

 white; scales beneath white, for the most part narrowly separated, 

 denser on the met-episterna; beak in the male thick, feebly arcuate, 

 as long as the head and prothorax, dull and closely sculptured, the 

 antennae inserted near three-fifths; prothorax as long as wide, the 

 sides barely visibly convergent and very nearly straight, gradually 



